Increase length on answer field when editing calculated questiontypes

The actual answer input element is inherited from the numerical where
the length is limited to 10 i.e. $repeated[1]->setSize(10);

The proposal is to set back this length to the standard 80

class qtype_calculated_edit_form extends qtype_numerical_edit_form {
public function get_per_answer_fields($mform, $label, $gradeoptions,
&$repeatedoptions, &$answersoption) {
$repeated = parent::get_per_answer_fields($mform, $label, $gradeoptions,
$repeatedoptions, $answersoption);
$repeated[1]->setSize(80);